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Multilayer ceramic capacitor

a multi-layer ceramic and capacitor technology, applied in the direction of fixed capacitors, stacked capacitors, fixed capacitor details, etc., can solve the problems of reduced insulation resistance, disadvantageous methods in producing large-capacitance and small-size multi-layer ceramic capacitors, etc., and achieve high strength

Active Publication Date: 2020-10-01
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent is about a new type of ceramic capacitor that has a strong side margin that is not easily affected by moisture. This helps to maintain the insulation resistance of the capacitor.

Problems solved by technology

Therefore, the method is disadvantageous in producing a large-capacitance and small-size multilayer ceramic capacitor.
However, the side margin with a small thickness has low strength, and also, moisture may penetrate through such a side margin and reach the internal electrode layer, causing a reduction in insulation resistance.

Method used

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  • Multilayer ceramic capacitor
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Embodiment Construction

[0021]Multilayer ceramic capacitors according to preferred embodiments of the present invention will be described in detail below with reference to the drawings.

[0022]The present invention is not limited to the following preferred embodiments, and may be suitably modified without departing from the gist of the present invention. Combinations of two or more preferred features described in the following preferred embodiments are also within the scope of the present invention.

Multilayer Ceramic Capacitor

[0023]FIG. 1 is a perspective view schematically showing an example of a multilayer ceramic capacitor according to a preferred embodiment of the present invention. FIG. 2 is a perspective view schematically showing an example of a laminate defining the multilayer ceramic capacitor shown in FIG. 1. FIG. 3 is a cross-sectional view taken along the line A-A of the multilayer ceramic capacitor shown in FIG. 1. FIG. 4 is a cross-sectional view taken along the line C-C of the multilayer ceram...

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Abstract

A multilayer ceramic capacitor includes a laminate including a dielectric ceramic layer and first and second internal electrode layers laminated in a lamination direction, and first and second external electrode connected to the internal electrode layers. The laminate includes a central layer portion, a peripheral layer portion sandwiching the central layer portion, and a side margin sandwiching the central layer portion and the peripheral layer portion. The side margin including an inner layer and an outer layer. In a cross section including a lamination direction and a width direction obtained by cutting the laminate at a central portion in a length direction, Si is segregated in an inner region including the inner layer and a boundary between the inner layer and the central layer portion, and a Si segregation spot in the inner region has a larger area than a Si segregation spot in the outer layer.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of priority to Japanese Patent Application No. 2019-064071 filed on Mar. 28, 2019. The entire contents of this application are hereby incorporated herein by reference.BACKGROUND OF THE INVENTION1. Field of the Invention[0002]The present invention relates to a multilayer ceramic capacitor.2. Description of the Related Art[0003]For example, JP 2006-73623 A describes, as a method of producing a multilayer ceramic capacitor, a method of alternately laminating green sheets and internal electrode layers before sintering to form a green chip, sintering the green chip, and then forming an external electrode on an end surface of a capacitor element body.[0004]In recent years, large-capacitance and small-sized multilayer ceramic capacitors have been demanded. In order to achieve such a multilayer ceramic capacitor, it is effective to increase effective areas of internal electrode layers occupying green sheets, th...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H01G4/30H01G4/12H01G4/012
CPCH01G4/30H01G4/1209H01G4/012H01G4/0085H01G4/232H01G4/2325
Inventor HARADA, TOSHIHIROMUKOBATA, YOHEI
Owner MURATA MFG CO LTD